| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual Monthly |
|
| Mean Max. Temperature (F) | 21.1 | 28.2 | 39.8 | 55.9 | 69.7 | 78.3 | 82.6 | 80.1 | 70.2 | 58.2 | 39.6 | 25.5 | 54.1 |
| Highest Mean Max. Temperature (F) | 33.1 | 38.4 | 47.9 | 67.9 | 79.7 | 85.6 | 88.7 | 87.5 | 76.3 | 65.6 | 48.7 | 34.1 | 88.7 |
| Year Highest Occurred | 1990 | 1987 | 1973 | 1987 | 1977 | 1988 | 1988 | 1976 | 1998 | 1973 | 1999 | 1979 | 1988 |
| Lowest Mean Max. Temperature (F) | 11.4 | 16.9 | 30.5 | 46.6 | 61.3 | 72.5 | 73.6 | 73.9 | 63.6 | 51.9 | 29.2 | 13.2 | 11.4 |
| Year Lowest Occurred | 1994 | 1989 | 1996 | 1975 | 1997 | 1998 | 1992 | 1985 | 1993 | 1987 | 1995 | 2000 | 1994 |
| Mean Temperature (F) | 7.5 | 14.6 | 27.5 | 42.7 | 55.4 | 64.5 | 68.9 | 66.3 | 56.4 | 44.6 | 28.6 | 13.5 | 40.9 |
| Highest Mean Temperature (F) | 19.4 | 29.7 | 36.7 | 50.4 | 63.6 | 70.0 | 72.8 | 70.8 | 62.2 | 51.3 | 37.7 | 25.2 | 72.8 |
| Year Highest Occurred | 1990 | 1998 | 2000 | 1977 | 1977 | 1988 | 1974 | 1973 | 1998 | 1973 | 1999 | 1997 | 1974 |
| Lowest Mean Temperature (F) | -7.1 | 2.2 | 20.1 | 36.4 | 49.9 | 58.7 | 62.5 | 60.9 | 51.6 | 38.9 | 19.6 | 0.7 | -7.1 |
| Year Lowest Occurred | 1982 | 1989 | 1996 | 1975 | 1983 | 1982 | 1992 | 1992 | 1984 | 1988 | 1985 | 1985 | 1982 |
| Mean Min. Temperature (F) | -6.1 | 1.0 | 15.1 | 29.5 | 41.0 | 50.6 | 55.1 | 52.5 | 42.6 | 30.9 | 17.6 | 1.5 | 27.6 |
| Highest Mean Min. Temperature (F) | 6.6 | 22.1 | 25.8 | 35.6 | 48.2 | 56.2 | 60.1 | 59.9 | 50.1 | 38.9 | 26.9 | 18.6 | 60.1 |
| Year Highest Occurred | 1998 | 1998 | 2000 | 1977 | 1991 | 1995 | 1999 | 1995 | 1994 | 1998 | 1998 | 1997 | 1999 |
| Lowest Mean Min. Temperature (F) | -26.6 | -14.6 | 4.8 | 23.8 | 34.0 | 43.8 | 47.4 | 45.9 | 36.6 | 24.5 | 5.5 | -14.6 | -26.6 |
| Year Lowest Occurred | 1982 | 1985 | 1984 | 1982 | 1984 | 1982 | 1984 | 1986 | 1974 | 1988 | 1984 | 1985 | 1982 |
| Mean Precipitation (in.) | 0.84 | 0.68 | 1.64 | 2.11 | 3.15 | 3.93 | 4.07 | 3.93 | 3.01 | 2.39 | 1.87 | 0.82 | 28.44 |
| Highest Precipitation (in.) | 2.91 | 1.97 | 4.32 | 5.68 | 6.10 | 8.95 | 9.02 | 13.41 | 7.67 | 8.49 | 6.19 | 2.20 | 13.41 |
| Year Highest Occurred | 1975 | 1971 | 1977 | 1986 | 1991 | 1984 | 1972 | 1995 | 1986 | 1971 | 1996 | 2000 | 1995 |
| Lowest Precipitation (in.) | 0.09 | 0.02 | 0.25 | 0.07 | 0.87 | 0.91 | 1.58 | 0.72 | 0.44 | 0.23 | 0.11 | 0.15 | 0.02 |
| Year Lowest Occurred | 1981 | 1997 | 1987 | 1987 | 1994 | 1987 | 1976 | 1976 | 1976 | 1976 | 1976 | 1975 | 1997 |
| Heating Degree Days (F) | 1785. | 1411. | 1164. | 669. | 321. | 94. | 34. | 73. | 271. | 634. | 1093. | 1596. | 9145. |
| Cooling Degree Days (F) | 0. | 0. | 0. | 0. | 22. | 77. | 153. | 114. | 13. | 0. | 0. | 0. | 379. |